EP0445904B1 - Verfahren zur Herstellung eines metallischen, dickwandigen Hochdruckrohres - Google Patents

Verfahren zur Herstellung eines metallischen, dickwandigen Hochdruckrohres Download PDF

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Publication number
EP0445904B1
EP0445904B1 EP91250063A EP91250063A EP0445904B1 EP 0445904 B1 EP0445904 B1 EP 0445904B1 EP 91250063 A EP91250063 A EP 91250063A EP 91250063 A EP91250063 A EP 91250063A EP 0445904 B1 EP0445904 B1 EP 0445904B1
Authority
EP
European Patent Office
Prior art keywords
cold
tube
heat treatment
preliminary
double
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91250063A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0445904A3 (en
EP0445904A2 (de
Inventor
Reinhard Lenze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vodafone GmbH
Original Assignee
Mannesmann AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0445904A2 publication Critical patent/EP0445904A2/de
Publication of EP0445904A3 publication Critical patent/EP0445904A3/de
Application granted granted Critical
Publication of EP0445904B1 publication Critical patent/EP0445904B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/154—Making multi-wall tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/02—Rigid pipes of metal
    • F16L9/04—Reinforced pipes

Definitions

  • Diesel engines are used in various ways as a drive unit for motor vehicles and ships or for driving generators, pumps or the like.
  • the fuel is supplied to the individual cylinders via a pump, with pressures of up to 1000 bar being reached and efforts being made to further increase the injection pressure in order to reduce the soot particle content in the exhaust gas flow.
  • the connection from the injection pump to the individual cylinders is made via exposed pipelines that are exposed to a high and pulsating internal pressure.
  • the pipes are designed to absorb the static pressure with a correspondingly thick wall and a D / s ratio in the range from 2.4 to 3.6. In addition, they have a smooth and flawless inner surface with regard to high fatigue strength.
  • the inside diameter may only fluctuate within a narrow tolerance range, as this is important for the uniformity of the flow conditions in order to achieve an optimal adaptation to the theoretical design data.
  • the swelling internal pressure with amplitude fluctuations of 30 to 1500 bar and a frequency of 10-50 Hz mean a high alternating stress for the pipe, which is superimposed on the static internal pressure, whereby the resulting total stress can lead to damage and ultimately to the breakage of a pipe.
  • the failure of such a line also depends to a large extent on the size or orientation of the defects in the surface area resulting from the manufacturing process and how often they occur.
  • Cold trains without internal tools, which are also referred to as hollow trains, at the end of the manufacturing process are considered to be particularly critical in this context.
  • the object of the invention is to provide a simple and inexpensive method for producing high-pressure pipes with a D / s ratio of 2.4 to 3.6, which have a smooth inner surface and a uniform inner diameter profile and good cold formability and which have a pulsating inner pressure withstand greater than 1000 bar.
  • the advantage of the method according to the invention can be seen in the fact that the thin-walled inner tube is drawn from a hot-rolled tube blank over a series of cold passes, preferably with an internal tool, the reduction in wall thickness having a high proportion of the total deformation and being at least 40%, preferably 50% .
  • this leads to the imperfections resulting from the hot production process being reduced to an absolute scale and the inner surface being generally smoothed.
  • measurements have shown that the fluctuation range of the inner diameter of the inner tube is smaller than that of one comparable single-wall pipe. It is also advantageous that existing systems can be used by the pipe manufacturer and that new investments are not necessary. Furthermore, no further adjustments of either mechanical or procedural type are required in the case of further processors with regard to the bending and upsetting of such a double-wall pipe.
  • the two telescoping telescopic tubes can go through a different manufacturing process, whereby it has proven to be advantageous to produce the outer and the inner telescopic tube by cold drawing and to leave them in this state before being pushed together.
  • the difference between the outer diameter of the inner tube and the inner diameter of the outer tube is kept small and is between 2/10 and 6/10 mm.
  • the two possibly overlapping tolerance fields of the inner and outer downpipe must also be taken into account.
  • the first cold drawing after the heat treatment is a drawing with an internal tool.
  • the surface pressure occurring during the drawing between the two telescopic tubes pushed into one another is increased further, and the clamping is improved accordingly.
  • the drawing parameters it can be achieved that the relative movement between the two front pipes during drawing is almost zero and the respective roughness profile of one surface is pressed into that of the other front pipe.
  • the relative movement is very large and Roughness peaks are bent, if not sheared off.
  • the two front pipes are preferably produced from the same material, but different material pairings are also conceivable.
  • B. with a view to optimizing the wall thickness ratios and forming conditions an unalloyed with a medium-alloy or even high-alloy steel.
  • the outer tube made of a high-alloy steel also takes on corrosion protection tasks at the same time.
  • the required heat treatment between the cold passes involves normalizing under protective gas in the temperature range between 900 - 940 degrees Celsius, preferably 920 degrees Celsius, the protective gas being used to largely suppress decarburization at the edge.
  • the final heat treatment of the finished double-wall pipe is also normal annealing under protective gas in the specified temperature range.
  • the production sequence of a pipe measuring 6 x 1.875 mm is given (all specifications in mm).
  • the same material, e.g. B. uses an unalloyed carbon steel with the quality designation S30.
  • Tube A (outer tube) Tube B (inner tube)
  • the example also shows that it is difficult to completely dispense with drawing without an internal tool for a given drawing system for a given drawing sequence. It is only important that, as already mentioned at the beginning, this proportion should be very small, this being particularly the case for the inner front pipe and also for the double wall pipe applies. For this reason, it is proposed that the last cold draft of the double-wall pipe be designed as a smoothing draft before the final heat treatment. This means that although the reduction in wall thickness is only slight, support by the inner tool is always advantageous for smoothing the inner surface and the uniformity of the inner diameter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Metal Extraction Processes (AREA)
  • Heat Treatment Of Articles (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Extrusion Of Metal (AREA)
EP91250063A 1990-03-08 1991-03-08 Verfahren zur Herstellung eines metallischen, dickwandigen Hochdruckrohres Expired - Lifetime EP0445904B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4007737 1990-03-08
DE4007737 1990-03-08
DE4105701 1991-02-21
DE4105701A DE4105701A1 (de) 1990-03-08 1991-02-21 Verfahren zur herstellung eines metallischen, dickwandigen hochdruckrohres

Publications (3)

Publication Number Publication Date
EP0445904A2 EP0445904A2 (de) 1991-09-11
EP0445904A3 EP0445904A3 (en) 1992-03-04
EP0445904B1 true EP0445904B1 (de) 1994-09-28

Family

ID=25891027

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91250063A Expired - Lifetime EP0445904B1 (de) 1990-03-08 1991-03-08 Verfahren zur Herstellung eines metallischen, dickwandigen Hochdruckrohres

Country Status (3)

Country Link
EP (1) EP0445904B1 (enrdf_load_stackoverflow)
AT (1) ATE112190T1 (enrdf_load_stackoverflow)
DE (2) DE4105701A1 (enrdf_load_stackoverflow)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4130524C1 (enrdf_load_stackoverflow) * 1991-09-13 1993-01-07 W.C. Heraeus Gmbh, 6450 Hanau, De
DE4311391C2 (de) * 1992-04-09 1998-10-08 Usui Kokusai Sangyo Kk Hochdruckkraftstoffeinspritzleitung
EP0666341B1 (en) * 1994-02-08 1997-08-06 Sumitomo Metal Industries, Ltd. Process for manufacturing clad pipe
DE4428875C2 (de) * 1994-08-08 1996-10-24 Mannesmann Ag Verfahren zur Herstellung einer hohlen Achse
US5887628A (en) * 1996-04-22 1999-03-30 Usui Kokusai Sangyo Kaisha Limited High pressure fuel injection pipe for diesel internal combustion engine
DE19823832A1 (de) 1998-05-28 1999-12-09 Heraeus Gmbh W C Verfahren zur Herstellung von Verbund-Rohren aus Metall sowie Verbundrohr und dessen Verwendung
DE102007011868B3 (de) * 2007-03-07 2008-09-04 Mannesmann Präzisrohr GmbH Verfahren zur Herstellung eines Hochdruckspeicherrohres aus Stahl für Kraftstoffeinspritzanlagen
CN104138925B (zh) * 2014-06-18 2016-12-28 青岛申达众创技术服务有限公司 一种铜/磷双金属毛细管的制备方法
CN104259242B (zh) * 2014-08-11 2017-03-22 天津润德中天钢管有限公司 氧气瓶用冷拔无缝管制造工艺
DE102015122296A1 (de) * 2015-12-18 2017-06-22 Sandvik Materials Technology Deutschland Gmbh Sensor für eine Hochdruckleitung sowie Verfahren zu seiner Herstellung
DE102015122297A1 (de) * 2015-12-18 2017-06-22 Sandvik Materials Technology Deutschland Gmbh Verfahren zum Herstellen eines Hochdruckrohres
CN110524201A (zh) * 2019-09-09 2019-12-03 新疆八一钢铁股份有限公司 一种适合高盐度环境下使用的抽油杆
CN113333491B (zh) * 2021-01-19 2022-05-17 中航上大高温合金材料有限公司 一种gh738合金冷拉棒材生产方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863328A (en) * 1972-10-10 1975-02-04 Copperweld Steel Co Method of making a Composite steel tubing
JPS50158220U (enrdf_load_stackoverflow) * 1974-06-17 1975-12-27
US4070209A (en) * 1976-11-18 1978-01-24 Usui International Industry, Ltd. Method of producing a high pressure fuel injection pipe
US4125924A (en) * 1977-04-04 1978-11-21 United States Steel Corporation Method of producing composite metal pipe
JP2575624B2 (ja) * 1985-07-25 1997-01-29 臼井国際産業 株式会社 高圧燃料噴射管用厚肉細径重合金属管の製造方法
JP2796551B2 (ja) * 1989-02-07 1998-09-10 臼井国際産業株式会社 厚肉細径燃料噴射管及びその製造方法

Also Published As

Publication number Publication date
ATE112190T1 (de) 1994-10-15
DE59103071D1 (de) 1994-11-03
DE4105701C2 (enrdf_load_stackoverflow) 1992-11-26
DE4105701A1 (de) 1991-09-12
EP0445904A3 (en) 1992-03-04
EP0445904A2 (de) 1991-09-11

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